At what point should I be able to do the weekly DDQ node with the legendary token reward? 4* need to be fully covered and champed to have a shot? Or event 20-30 levels into champ?
Way earlier than that. They don’t have to be fully covered, and usually somwhere around lv 110-150 will get you there. Check out Peter Gibbons’ sticky thread in this forum - it shows each matchup from the first couple runs and what people have managed to beat it with. Some characters can do it with a single cover.
If they’re lower level, boosts help a lot, and you may need to take several cracks at it. A bad board is especially harsh since you only have 3 colors, and usually have to prioritize denying your opponent their actives.
Depends on who.
I beat the winter soilder crash today with level 94 1/2/1.